Rotary cooler for cement clinker.



A. SGHFPER. 1 ROTARY COOLER FOB. lCEMENT GLINKER.

APPLIOATION FILED MAY 18, 1911. Y v

Patented Jan.' 7, 1913.

4 SHEETS-SHEET 1 5 woe W60@ "\\k\\\\\\\\\\\\\\\\\\li4l\\\\\ .n m l QWMWM Mmm jw Q w llm Q Irv-. ai. 1

A. SCHPFER.

ROTARY GOOL'ER FOR GBMENT CLINKER. APPLIOATION FILED 11u18, 1911.

4 SHBETSfSHBI-IT 2.

f 2 /g Q a 5 .mz `\U y www -Mffiw Patented Jan.. 7, 1913.

A. SGHFPEB. ROTARY COOLER FOB. CEMENT GLINKEB. -I

APPLICATION FILED HAY 18, 1911. y

1,049,610. A PatnneglJam.141913.*` -F/n'g' 4 SHEETS-SHEET 3. I

4 SHEETS-SHEET 4.

/NVEA/TR HNEY A. SGHPPBR.

ROTARY COOLER FORvOEMENT GLINKER.

APPLIOATION FLED MAY 18, 1911. 1,049,610.

Patented Jan. 7, 1913.

.llTlllIllI ILIIJ ErED s'rATEs PATENT OFFICE.

AXEL SCHFFER, 0F -COPENHAGEN, DENMARK, ASSIGNOR TO F. L. SIVIIDTHA & CO., 0F

NEW YORK, 1\T.` Y., A CORPORATION OF, NEW JERSEY.

ROTARY COOLER FR CEMENT CLIPNKER.

Loaaeio.

Specification of Letters Patent.

Patented Jan. 7, 1913.

Original application filed November 2,` 1910, Serial No. 590,268. Divided and 'this application led May 1s, 1911. serial No. 627,978.

To all whom t may concern: Y

Be it known ythat I, AXEL SCHFFER, a subject of the King of Denmark, residing in the cit-y of Copenhagen, Denmark, have 5 invented certain'new and useful Improvevments in Rot-ary Coolers. for Cement Clinker, of which the following is a spec-itlcat-ion, reference being had to the accompanying drawings, forming a part hereof,

cation Serial No. 590,268, filed ANovember `2, 1910.

' This invention relates to rot'arykilns such as are `employed in the'burning of cement and for -other purposes, and particularly to accompanying drawings in which it is illus-- trated and in which- Figure l is a view part-ly in outline or elevation and partly in section showing so much of the rotary kiln ywith the cooler as is necessary to' enable the invention to be understood. Figs. 2-8 are detail views illustrating features of construction of the cooler. Fig. 9 is a vertical longitudinal sectional View of the ent-ire cooler.

The -kiln a, which may be of any suitable construction, so far as this invention is concerned, but is preferably of the construction indicated, is supported for .rotation and is rotated by any usual or suitable means. 4The clinker or product of the kiln is discharged at the discharge end as of the kiln, through a movable hood or closure b which is shown as supported upon wheels 0 and as provided with a suitable nozzle d through which powdered, gaseous or liquid fuel 'may be introduced. This hood, which is arranged tofit somewhat closely about the discharge end of the kiln a, is preferably. double walled, having lateral air channels, one ofwhich is indicated in part by dotted lines, as at e, and a central chamber f, the

lateral channels e and the chamber f being.

open at the bottom to communicate with an this application being a divisionV of appliair or dust chamber g below the hood. The clinker or other material is discharged through. the vcentral chamber f into achute ff by which it is directed into the lcooler c. Air, heated in the cooler by absorption of heat from the clinker, passes upward 'into cooler has an'inner shell k3., a passage for air being thereby formed between the inner and outer shells, as hereinafter. described more particularly. The portion k2 also has Y an inner shell ict, a passage being formed thereby between the inner and'outer shells for the passage of the hot clinker, sothat -the'hot clinker may pass fromthe interior of the inner shell 704 through an opening or openings 7:5 nearthe end thereof into the passage between the inner and outer shells and thence in a forwardly direction. to the 'forward end of the outer shell'plcz' from which it passes into a stationary, annular.

receiving shell Zwhic'h surrounds the cooler at the point where theforward portion c and the rear portion 7c? meet. The receiver Z is shown as connected by a pipe z" with a blower z' yand the airwhich is thus supplied under pressure finds its way, as hereinafter described, partly through the pass'agebetween the inner and outer shells 7:4 and k?, into the Vinner shell 104, partly into the inner shells las and '764 and partly into the .passage between the forward shells 7c and k3,- being. fmally delivered at the forward end of the-cooler from which part of lthe air may pass forward throughthe chute f and'the chamber f into the' kiln and part- K into the dust chamber g andthence upward through the passages ein the hood or closure through the injector around the fuel tube Z into the. kiln.` The. air which is supplied under pressure from the blower z' or other sourceistherefore kept fora suitable .time

in contact with the hot clinker and absorbsy heat therefrom so thatthe clinker is cooled before it is finally discharged and the air is heated before it is admitted into the kiln.

The details of the construction of the cooler, with its double walls, are shown in Figs. 2 9. As shown in Fig. 2, the outer shell 7c of the forward sect-ion of the cooler has secured thereto an annular angle iron m to which are secured two cast iron rings m and m2. Between the latter is placed loosely a steel ring m3 which fits somewhat closely within an angle ring m4 which is built into the masonry which forms the wall of the dust chamber g.- This construction therefore forms a comparatively tight joint to prevent the escape of air-at this point while it also permits free rotation of the cooler and longitudinal movement of the end of the cooler under expansion and contraction. The cast iron ring m2 has a conical flange m5 'which catches Such material as may spill over the end of the inner shell 7c3 and direct it into the space between the inner and outer shells k3, c, from which it passes eventuallv into the receiving shell Z. The flange m5 also prevents the material from falling upon the ring m4, where it might cause rapid wear between the ring m3 and the ring m4 and consequent leakage of air. The inner wall or shell k3 of the forwardportion of the cooler is made up of a series of liner plates n, (as may also be the inner wall 7a4 of the rearward portion of the cooler) which are formed, as shown particularly in Figs. 3, 4 and 5, so that they may be replaced readily and whenever required, shall have a suitable radiating surface and shall also have obliquely disposed ribs to feed the clinker toward the rear end of the cooler. Each plate may be formed on two of its sides with offset flanges n to overlap the adjacent edges of the next plate and is also formed with obliquely disposed hollow ribs n2 which facilitate the radiation of heat from the clinker and also cause the cllnker to travel toward the rear end of the cooler. On the outer side of each plate are formed spacing blocks or plates n3 preferably formed in a rectangle with holes n4. Bolts ns having their ends turned at a right angle as shown in Fig. 2 so as to enter the holes n4 in the spacing blocks n pass through holes n in a washer or filling plate a7 and receive outside of the washer `or fill- 1ng plate the nuts ns. Each liner plate n has but one of such rectangular spacing plates or blocks so that the liner plate is free to expand and contract in all directions without shearing the securing bolts. Furthermore, by the construction described the bolts may be inserted from the outside of the cooler so that if any bolt should break olf it may be replaced from the outside of the cooler while the cooler is hot with a loss of time.

The rearward portion k2 of the'cooler might have'its inner wall formed ofliner plates constructed and supported as shown in Figs. 2-5 but in Figs. 6 and 8 a different arrangement'ds illustrated. In this construction the outershell is supported on the inner shell by blocks 7c and la7 which are vsecured to the outer shell and the inner shell respectively and rest one upon the other. The relative position of the two shells is further maintained by channel irons las and la" shown in dotted lines in Fig. 8, which are oppositely placed and interlock as shown and are longitudinally disposed in the space between the shells for the purpose of agitating and distributing and therefore promoting the cooling of the material which passes through such space, the opposite angle irons being secured to the inner and outer shells respectively.

It will be obvious that the clinker flowing into the forward end of the cooler from the chute f will be moved rearward by the obliquely disposed ribs on the inner surface of the shell 7c3. From the forward portion of the cooler the clinker will be discharged tothe inner shell 7c2 of the rearward portion k2. When discharged thereon, the clinker will become so piled that an inclined floor` will be formed and an unbalanced force will be constantly tending to push the same rearwardly duringthe revolution of the cooler. From this inner shell h4 the material is .fed

constantly through the ports 705 into the grate bars 0 and supporting angle iron rings o', forms an'V extension of the outer shell k2 of the rear portion of the cooler forwardly` overlapping the rear end of the forward portion Ze', so that the material, which hasv rio escaped from the interior of the shell c* l through the. openings k and has been carried forward through the space between the inner shell 7c* andthe outer shell lc, is delivered to the grate or separator o, the smaller particles passing through the grate between the grate bars, into the chamberformed by the surrounding shell Z, from which the material may be removed con. tinuously, while the larger particles pass through the open forward end of the cylin- Y drical grate from which they may be received in a separate compartment. In the rearward end of the forward section k', lpreferably#within the portion covered by the grate o, are openingsv 701 which arecon- -trolled by adjustable sliding gates k, so

- backward through the spacebetween the inner and outer shells of the rearportion of the cooler in a direction opposite to that of the movement of the burned material within, and passes thence through the openings c. into the interior of the rear portion of the cooler and forward through the whole length of the cooler into the dust chamber g. The joints between the shell l and` the forward and rearward portions of the cooler, as at Z and Z2 respectively, may be constructed in the same manner as the joint at m at the forward end of the cooler, as shown in Fig. 2 and heretofore described with referen'ce thereto; If desired, a supplemental diaphragm p may be placed between the` forward portion of the cooler and the surrounding masonry to further check the leakage at the joint m.

It will be obvious that various changes in details of const-ruction and arrangement may be made to suitdiflerent conditions of use without departing from the spirit of the invention.

I. claim las my invention:

1. The combination with a chamber into which the material to be cooled is discharged from above, of a rotary coolerA projected into the chamber, means to form la relatively tight joint between the cooler an the surrounding wall of the chamber and a conical flange on the end of the cooler to y direct the material falling from the end of the cooler away from. said joint.

2. The combination with a chamber into which the material to be. cooled is discharged from above, of a rotary cooler prothe passage between the inner and outer shells. v

3. The combination with a chamber into which the material to be cooled is discharged from above, of a rotary cooler projected into the chamber,'two annular plates secured to the cooler and a loose annular plate placed between-the plates on the cooler .and fitting against the surrounding wall of the chamber. v

4. In a. device of the character described,

the ycombination of an outer cylindrical shell, an inner cylindrical shell composed of separate plates each having a spacing block, and bolts extended through the outer `shell and engaging the spacing block.

5. In a device of the character described, the combination of anL outer cylindrical shell, an inner cylindrical shell composed of separate plates eac-h having a h ollow spacing block with a lateral hole, an anglebolt `eX- tended through a relatively large opening in `the outer shell and engaging the spacing block r.and a washer covering said opening and supporting the bolt.

' 6. In a device of the character described, the combination lof an outer cylindrical shell and an inner cylindrical shell composed of separate plates each having. obliquely disposed ribs.

7. In` a device of the character described, the combination of an outer cylindrical shell and an inner cylindrical4 shell forming an annular passage therebetween, means to sup ply material to the inner shell and the annular passage, and obliquely disposed hol-` low ribs on the inner shell to cause material in the shell and in the passage to move.

8. In a. device of the character described, the combination of anouter cylindrical shell, an inner cylindrical shell,spacing blocks secured to said shellsrespectively, and interlocking angle irons secured to said shells respectively.

This specification signed and witnessed this third day of May A. D., 1911.

ERNEST BOUTARD, v P. HoFMAN-BAUZ. 

